Water vapor is a necessary component for graphite lubrication. The adsorption of water reduces the bonding energy between the hexagonal planes of the graphite to a lower level than the adhesion energy between a substrate and the graphite. Because water vapor is a requirement for lubrication, graphite is not effective in vacuum.

mayankdevnani

5 years ago

ok @thinker1

anonymous

5 years ago

actually if u see graphite is made of c-c sp2 bond and silane of si-0-si .silane bond is very strong as compared to that of graphite moreover both have lubricating properties .but c bonds can easily break in high temp. of machine leading to soot formation and other by producys leading to formation of materials that can jam themachinery.well i didnt knew about u r reason thanks for that well one more favour can u tell me in which class u r in

anonymous

5 years ago

@mayankdevnani

mayankdevnani

5 years ago

11 class

mayankdevnani

5 years ago

Graphite is characterized by two main groups: natural and synthetic

anonymous

5 years ago

so

mayankdevnani

5 years ago

The higher the carbon content and the degree of graphitization (high crystalline) the better the lubricity and resistance to oxidation in synthetic graphite....so its lubricant is WATER VAPOR.

anonymous

5 years ago

dang hes smart lol

mayankdevnani

5 years ago

ok @thinker1 then sorry i don't think

mayankdevnani

5 years ago

thnx.. @mikala1 you too..

anonymous

5 years ago

ye go on

mayankdevnani

5 years ago

what? it's finish lol ...hahaha

anonymous

5 years ago

but i have studied its lubricity mainly due to weak vanderwall's forces which enable slipping of one layer over other

mayankdevnani

5 years ago

it's another reason and in which class you are?

anonymous

5 years ago

12th

mayankdevnani

5 years ago

oh!!!!!!!1 sir

anonymous

5 years ago

be with me for a second

mayankdevnani

5 years ago

thank you it's my limit

mayankdevnani

5 years ago

ok as you wish!

anonymous

5 years ago

ok i got it i admire u r knowledge thanks and dont cal me sir only a yaer older than u!!!!!!!!!!!!!!!!!!!!